#include <REGX52.H>
#include <intrins.h>

void Delay(unsigned int xms)		//@12.000MHz
{
	unsigned char i, j;

	while(xms--)
	{
	i = 39;
	j = 230;
	do
	{
		while (--j);
	} 
	while (--i);
	}
}


void main()
{
	while(1)
	{
		if(P3_1==0)
		{
			Delay(20);
			while(P3_1==0);
			Delay(20);
			while(1)
			{
				if(P3_0==0)
				{
					Delay(20);
					while(P3_0==0);
					Delay(20);
					P2_0=~P2_0;
				}
			}
		}
	}
}